title: Enhancement of chemical sensing capability in a photonic crystal fiber with a hollow high index ring defect at the center.
abstract: A new type of index-guided photonic crystal fiber is proposed to enhance chemical sensing capability by introducing a hollow high index ring defect that consists of the central air hole surrounded by a high index GeO2 doped SiO2 glass ring. Optical properties of the fundamental guided mode were numerically analyzed using the full-vector finite element method varying the design parameters of both the defects in the center and the hexagonal air-silica lattice in the cladding. Enhanced evanescent wave interaction in the holey region and lower confinement loss by an order of magnitude were achieved simultaneously, which shows a high potential in hyper sensitive fiber-optic chemical sensing applications.
authors.affiliation: Institute of Physics and Applied Physics, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea.
authors.forename: Jiyoung
authors.initials: J
authors.lastname: Park
authors.forename: Sejin
authors.initials: S
authors.lastname: Lee
authors.forename: Soan
authors.initials: S
authors.lastname: Kim
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh
mesh_terms: D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis*; D055096:Optical Devices; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers
chemical_list: D005740:Gases